Friction mechanism.



. PATENTED JUNE 23, 1903. P. 0. WILSON, D. W. BASSBTT & J. BRING.

FRICTION MECHANISM. APYLIOATIOH FILED DETL'Z, 1901.

NO-MODBL rERoY oARLIsLn WILSON, DAVID WILLIAM BASSETT, AND JOHN DRING, I

Patented J'une' 23, 190%.

OF LONDON, ENGLAND.

FRICTI ON MECHANISM.

SPEGIFICATION forming part of Letters Patent N 0. 731,646, dated June 23, 1903.-

* Application filed December 2, 1901. Serial No. 84,394. (No model.)

To (IIZZ whom it may concern: Be it known that we, PERCY GA RLISLE l/VIL- son, DAVID WILLIAM BAssETr, and JOHN DRING, subjects of His Majesty the King of Great Britain, residing at London, in the county of Middlesex, England, have invented new and useful Improvements in Friction Mechanism for Brakes, Clutches, and the Like, of which the following is a specification.

Our invention relates to that class of bandbrake or friction mechanism which is equally effective in stopping or coupling parts rotating in either direction; and it has for its objects toimprove and simplify the said parts and to combine therewith improved means for operating the said parts.

Referring to the accompanying drawings,

Figure 1 shows a rear view of our invention part c.

terial encircling the drum a.

as applied to a vehicle-brake Fig. 2 is a front elevation of the brake, drawn to a larger scale; and Fig. 3 is a partial side elevation thereof. Fig. 4 shows our invention as applied to a clutch.

or represents a brake or friction-drum made fast to the road-wheel b or a shaft or other (Z is a band of metal or other suitable ma- The band d is provided at its ends with brackets e and f, to

which force is applied when it is desired to actuate the brake.

g and h are studs carried by the brackets e and f, respectively. These studs pass through holes 11 in the brackets e and f, wherein they are retained by washers and split-pins 70, while their opposite extremities engage the slot lot" a plate or bracket m, which is made specification of Letters Patent of the United States granted to E. M. Bowd'en, No. 609,570, according to. which power is transmitted from one point' to another by means of a wire or member which while flexible is inextensible,

and it is arranged within a tortuous guide tube or member formed of spirally-coiled wire whichwhile flexible laterallyis incompressible mechanism, and it is secured to the bracket e and tension is applied to it. pis the incompressible member of the said mechanism, and its extremity abuts against an internal shoulder in an adjustable stop q, screwed into the brackctf. As a result of the tension on the inextensible member 0 it will be pulled through the incompressible member 19, which reacting on the bracket f will cause it and the bracket 6 to approach each other, drawing with them the ends of the band 61, which will thus be caused to grip the drum a, whose rotation when in the direction of arrow 7" will in turn cause the stud h to travel to the end s of the slot Z and there become the fixed point, whereas if the direction of rotation of the drum be reversed the band and its attachments will travel in the reverse direction until the stud g reaches the end tof the said slot Z. In this way it will be seen that the frictional contact of the drum with the band always causes additional tension (resulting in additional braking force) to be applied to the said band irrespectively of the direction of rotation.

In applying our invention to the construc-- tion of clutches the drum a is made fast to one part and the disk a or an equivalent part, which is. provided with a slot Z, is secured to the other part. A band (Z, similar in all respects to that described with reference to the other figures of the drawings, is applied to the drum a in like manner, and its studs 9 h engage the slot Z. The Bowden connection shown to operate the clutch is of similar construction to that previously described, the other end of the inextensible member 0 being preferably connected to a sleeve (not shown) adapted to slide along the shaft or equivalent part to which the disk u issecured. Springs 0 may be employed to open the band cZ when the brake is off or the clutch open, and the form of the slot Z may be such as to hold the said band clear of the drum a when the former is in its normal position-11 a, not applied.

an incompressible member the inextensible member being secured to one of said brackets and the incompressible member to the other of said brackets.

In testimony whereof We have hereunto i5 subscribed our names.

PERCY CARLISLE WILSON. DAVID WILLIAM BASSETT. JOHN DRING.

Witnesses to the signatures of Percy Carlisle Wilson and John Dring:

J. S. WITHERS, WALTER J. SKERTEN. Witnesses to the signature of David Villiam Bassett:

E. HARKER, W. EDGAR JONES. 

